<ul id="menu_tab">
    <li id="tab_absen"><?php echo anchor('absen', 'Absen'); ?> </li>
    <li id="tab_rekap"><?php echo anchor('rekap','Rekap'); ?> </li>
    <li id="tab_siswa"><?php echo anchor('siswa','Siswa'); ?> </li>
    <li id="tab_semester"><?php echo anchor('semester','Semester'); ?></li>
    <li id="tab_kelas"><?php echo anchor('kelas','Kelas');?></li>
    <li id="tab_logout"><?php echo anchor('logout','Logout', array('onclick' => "return confirm('Anda Yakin Ingin Logout?')"));?></li>
</ul>